{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:08:40.610335", "data_source": "ERA5", "website": "http://wexa.jamstec.go.jp", "Author": "Patrick Martineau"}, "event_id": {"name": "Event ID", "description": "A unique identifier based on: beginning_date, end_date, longitude, and latitude", "value": "2017-Aug-17_to_2017-Aug-19_21.5_-21.0"}, "event_label": {"name": "Event label", "description": "Integer-valued grid identifier that uniquely labels each detected extreme event in space and time, consistent with the corresponding labels stored in the NetCDF dataset.", "value": 2017080000530}, "status": {"name": "Status", "description": "An ongoing event denotes an event that lasts up to the latest data available. These events are subject to change as newer data is added.", "value": false}, "start_date": {"name": "Start date", "description": "First date on which grid points are under the influence of an event", "value": "August 17 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 19 2017"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "figures_available": {"name": "Figures available", "description": "True if figures were pre-generated for this event", "value": true}, "detection_var": {"name": "Detection variable", "description": "Variable used for the detection scheme", "value": "t2m"}, "event_type": {"name": "Event type", "description": "Type of the event detected", "value": "Cold spell"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 95323.33269965454}, "countries_affected": {"name": "Countries affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the countries affected by an event during its lifetime.", "value": ["Botswana", "Namibia"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.Southern-Africa"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa"]}, "oceans_affected": {"name": "Ocean basins affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the ocean basins affected by an event during its lifetime.", "value": []}, "center_lat": {"name": "Center latitude", "description": "Latitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": -21.0}, "center_lon": {"name": "Center longitude", "description": "Longitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": 21.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "21.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 18.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 23.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -21.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -19.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-08-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[17.97, -19.97], [18.5, -19.75], [18.75, -19.85], [18.82, -19.82], [18.97, -19.47], [19.5, -19.25], [19.75, -19.35], [20.0, -19.25], [20.53, -19.47], [20.7, -19.87], [20.82, -19.82], [20.97, -19.47], [21.5, -19.25], [22.0, -19.46], [22.5, -19.25], [23.03, -19.47], [23.18, -19.82], [23.25, -19.85], [23.5, -19.75], [24.03, -19.97], [24.25, -20.5], [24.15, -20.75], [24.25, -21.0], [24.03, -21.53], [23.68, -21.68], [23.53, -22.03], [23.0, -22.25], [22.75, -22.15], [22.5, -22.25], [22.25, -22.15], [22.0, -22.25], [21.75, -22.15], [21.5, -22.25], [21.25, -22.15], [21.0, -22.25], [20.75, -22.15], [20.5, -22.25], [20.25, -22.15], [20.0, -22.25], [19.75, -22.15], [19.5, -22.25], [18.97, -22.03], [18.82, -21.68], [18.75, -21.65], [18.5, -21.75], [17.97, -21.53], [17.75, -21.0], [17.85, -20.75], [17.75, -20.5], [17.97, -19.97]]]]}, "2017-08-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[17.97, -19.97], [18.5, -19.75], [18.75, -19.85], [18.82, -19.82], [18.97, -19.47], [19.5, -19.25], [19.75, -19.35], [20.0, -19.25], [20.53, -19.47], [20.7, -19.87], [20.82, -19.82], [20.97, -19.47], [21.5, -19.25], [22.0, -19.46], [22.5, -19.25], [23.03, -19.47], [23.18, -19.82], [23.25, -19.85], [23.5, -19.75], [24.03, -19.97], [24.25, -20.5], [24.15, -20.75], [24.25, -21.0], [24.03, -21.53], [23.68, -21.68], [23.53, -22.03], [23.0, -22.25], [22.75, -22.15], [22.5, -22.25], [22.25, -22.15], [22.0, -22.25], [21.75, -22.15], [21.5, -22.25], [21.25, -22.15], [21.0, -22.25], [20.75, -22.15], [20.5, -22.25], [20.25, -22.15], [20.0, -22.25], [19.75, -22.15], [19.5, -22.25], [18.97, -22.03], [18.82, -21.68], [18.75, -21.65], [18.5, -21.75], [17.97, -21.53], [17.75, -21.0], [17.85, -20.75], [17.75, -20.5], [17.97, -19.97]]]]}, "2017-08-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[17.97, -19.97], [18.5, -19.75], [18.75, -19.85], [18.82, -19.82], [18.97, -19.47], [19.5, -19.25], [19.75, -19.35], [20.0, -19.25], [20.53, -19.47], [20.7, -19.87], [20.82, -19.82], [20.97, -19.47], [21.5, -19.25], [22.0, -19.46], [22.5, -19.25], [23.03, -19.47], [23.18, -19.82], [23.25, -19.85], [23.5, -19.75], [24.03, -19.97], [24.25, -20.5], [24.15, -20.75], [24.25, -21.0], [24.03, -21.53], [23.68, -21.68], [23.53, -22.03], [23.0, -22.25], [22.75, -22.15], [22.5, -22.25], [22.25, -22.15], [22.0, -22.25], [21.75, -22.15], [21.5, -22.25], [21.25, -22.15], [21.0, -22.25], [20.75, -22.15], [20.5, -22.25], [20.25, -22.15], [20.0, -22.25], [19.75, -22.15], [19.5, -22.25], [18.97, -22.03], [18.82, -21.68], [18.75, -21.65], [18.5, -21.75], [17.97, -21.53], [17.75, -21.0], [17.85, -20.75], [17.75, -20.5], [17.97, -19.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.705406620211818}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.105502023542944}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [14.190177734858139, 11.970966722002288, 14.47241232066375]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [11.538138348167877, 10.490071669409701, 13.042249523078624]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.192680418466678, -6.670045259421969, -4.4537803927401844]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.1846164091643345, -7.705406620211818, -5.637003938051691]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6617620310117602, -2.54338173652481, -1.699481948862621]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9038220518841826, -3.049529137756115, -2.224575159673353]}}